Rotary molding machine



May 18 1926.

1,584,808 E. v. RoNcERAY ROTARY MoLDINeMAcHINE Filed sept. v5; 1922 4 .sheets-sheet 1 May 18 1926.

ROTARY MOLDING MACHINE Filed sep't. e, 1922 4 sheets-sheet 2 May 18 1926.

4 Sheets-Sheet 5 E. vV.` RONCERAY ROTARY MOLDING MACHINE Filed Sept. 6, 1922 MJS May 18,1926. 1,584,308

E. V. RONCERAY ROTARY MOLDING MACHINE Filed sept. le, 1922 4 sheets-sheet 4 v Ff Patented May 18, 1926.

EUGNE vrcmon noNCERAY, or onoIsY LE no1, FRANCE.

` tornar MoLDING MAcHINF.

Application led September 6, 1922. SerialNo. 586,545.

VThe present invention relates to a molding machine the 'characteristic features whereofconsist in that the table is movable, while the press'head is stationary, an unmolding being effected by hand by means of a suitable braking device; moreover the machine is also provided with a pressing device comprising a stop piece which is regulable for the upward and. downward strokes of the piston of the machine, and the rotation of the engine is afforded by vmeans of a single cylinder, one rod and one crank -instead-oftwo cylinders, a chainand a sprocket wheel as in the known machines.

l, .1 5 In' the accompanying drawing and by wayof example:

Fig. 1 is an elevational view of the whole machine,

Fig. 2' is'an axial vertical section of the press head on the line A-A (Fig. `1) Ona arger scale.

' Fig, 3is a vertical section of the'driving device on the line B-B (Fig. 1).

Fig. 4 is a side elevation of the same.

. Fig. 5 is a vertical sectional view through 'the axis of the uidingl piston of the unmolding plate and showing the device which permits unmolding by hand vand which is provided with a suitable brake.

Y As shown in the drawing, the press head ais bolted upon the pivoted support b which `may rotate about its lateral horizontal extension a. The table d-is adapted to pivot about said support b in order to be turned 35. out, when said table is in its upper position as well as, when it is in its lower position. Unlolding by hand without turning over the support b ,is effected by means of a lever e connected by the crankv to the rod g 4K0 'whereby the unmolding p ate lz, may be liir'ted and this device 'is vprovided with'la cbrake of the -kind of the ratchet device or `-'friction ratchetgea'r'or the like, so that when the lever e' is released, the unmolding plate h;

rmay be the position of v*the table. w Y

.-' It;isto be noted that -the brake of the un-v molding.- 'device maybe as well usedwith *may 'remain1n'\ os'ition under the effect of Atheload', whatege ':..'I.`.he molding and unmolding operations "floii-thapress'm plate Al are obtained by p65 iinderi pressure permanently upon surrounding the same for effecting the upward stroke of said piston. For effecting the downward stroke, water under pressure is admitted at will above the piston, into the upper chamber H of the cylinder. Since the surface of the upper face of the piston, equal to the cross section of the cylinder bore, is larger than the annular area.- of the end faces E and F of the said annu- 05 lar chamber j the pressure force causing the downward stroke of the piston will be' much greater than the constant force tending to lift the same, and the 'difference between'these two forces will be adjusted in 70 order to obtain the required pressing 'of the sand within the molding frame. At the end of the upward stroke the piston z' abuts agai'nst a central screw lc, and at the end ofl the downward stroke the piston meets the 75 f nut Z which may be screwed upon the screw m surrounding the central screw k. The position of said screw la may be varied -by unscrewing the `upper plugm, screwed into the central bore of the handwheel p byv means `of which the pressing action may be regulatedv as will be set forth hereinafter: said plug n lhaving been removed the central nscrew c is rotated by means of a socket wrench which may engage a square hole 85- provided at the upper end lof thevscrew The regulation of the length of the downward stroke isefected `by rotating the handV wheel p secured to the annular'V screw m, while the nut Z is prevented from rotating by two longitudinal lugs s integral with the inner part of the piston z' and which engage two grooves 1' provided in said nut.- A

The rotation ofthe machine in case the unmolding operationl should require it is obtained by means of a piston t1 which moves within a cylinder t under the action of water .under pressure which is admitted first at' the upper part of lsaid cylinder, and then 10 at its lower part whil'ethe water admitted at the upper part 2is evacuated.

This is effected by-means of a hand lever w. controlling a distributor v adapted to 'direct' the water to the upper part and to the lower m5 part of the cylinder t successively.

For this purpose, a cam u1 is securedl to the leveru, and said cam is adapted to o crate -in ne position the valvev1 of the dls-f tributor fv which-controls the admiion of u, waterintothe upper parts of the cylinder-t,

and inthe other position the valve t" of the y 35 lw of the connecting rod'w1 strikes the roller same which controls the admission of the water at thelower part I of the cylinder t. The cam u1 is locked in the first position by a hooked piece :c which is constantly drawn downwardly by a spring y; a two arm lever a pivoted about .an axle R carries -on one of its arms a roller .al which is on the way of the cross head w of the connecting rod connected to the piston t1 by means of the connecting rod w1; the end of the other arm of the lever z is connected by means of a rod T to the end of the said hooked piece The operation of the device is as follows: lVhen the machine is in the starting position with its table ci at the lower part as shown on Fig. l, the pistonz1 is at the end of its upward stroke, i. e. at the top of the cylinder t and the connecting rod w1 occupies the position shown on Fig. 4. To rotate the support b together with the press heada and the table d, the lever u is raised, which rotates the cam u1. The latter is locked by the hooked piece a: impelled downwardly by the spring y; in this position, the cam al pushes in a constant manner the valve o1 of the distributor fv, so that water under pressure is led into the upper part S ofthe cylinder t, Now the piston t1 will descend and, by means of the connecting rod w1, rotate the support b about a quarter of a revolution. When arriving at the end of its downward stroke, and immediatelygbefore reaching this position, the cross head 21, carried by the lever a. The latter pivots about .its axis R, thus raising the hooked piece which releases the cam u1 set under the action of the spring y1. This cam is now rotated by Fthis spring, thus releasing the valve 'v1 for putting the upper chamber S of the cylinder t in communication with the outlet, and pushing the valve fu2 for admittmg water under pressure into the lower part I of the said cylinder, under the piston t1. Consequently the piston t1 will rise and, through the medium of the connecting rod w1, cause the support b to rotate about a further quarter of a revolution. Now the table d has reached the upper position and the press head a the lower position. The operation of returning the machine into the starting position is the same as the preceding but the connecting rod w1 effecting a reverse movement. l

The operation and function of the machine as a whole is as follows: A pattern plate is secured upon the table d and the required fiasks are laid upon the unmolding rods C carried by the unmolding plate'h.W Sand is poured into said fiasks in the usual manner. Then, water under pressure is admitted into the chamber H of the press head, this causing the pressing plate P to lower and to press the sand within the iasks.

This being effected, and in order to carry out the unmolding operation by hand, the chamber H is connected with the outlet which causes the piston to rise in the above described nianner. By acting on the lever c, the frame. together with the mold are raised through the medium of table it and unmolding rods C. The mold being thus released from the pattern plate is now removed and the machine is ready for a next operation.

lf the mold comprises a heavy core that would afford difficulties in unmolding by hand, after the pressing plate P having pressed the sand the support Z) is rotated about a half of a revolution and unmolding is effected by simply connecting the chamber H to the outlet thus allowing the plate P to descend together with the mold. If necessary the releasing of the mold from the pattern plate may be aided by acting on lever c, thus causing the unmolding rods C to push down the flasks of the mold.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A rotary molding machine comprising a vertical rotatable support, a movable table adapted to pivot about one end of said support and provided with an unmolding plate, a stationary press head securedv on the other end of said ysupport and comprising a cylinder, a piston movable within said cylinder and adapted to exert the pressing action towards the table and to be raised thereafter for Ipermitting the unmolding, means for lifting said unmolding plate and means for rotating said support about a horizontal axis.

2. A rotary molding machine comprising a vertical rotatable support, a movable table adapted to pivot about one end of said support and provided with an unmolding plate, a stationary press head secured on the other end of said support and comprising a cylinder, a piston movable within said cylinder and adapted to exert the pressing action towards the 'table and to be raised thereafter for permitting the unmolding, means embodying a lever and a crank for lifting said unmolding plate, said means being provided with a braking device, means for lifting said unmolding plate and means for rotating saidsupport about a horizontal axis.

3. A rotary molding machine comprising a vertical rotatable support, a movable table adapted to pivot about one end of said support and provided with an unmolding plate, a stationary press head secured on the other end of said support and comprising a cylinder, a piston movable within said cylinder and adapted to exert the pressing action towards the table and to be raised thereafter for permitting Vthe unmolding, means comprising two regulable stop pieces within said cylinder for regulating the upward and downward strokes of the piston, means for iii lifting said unmolding plate, and means for rotating said support about a horizontal axis. t Y

4, A. rotary molding machine comprising a vertical rotatable support, a movable table adapted to pivot about one end of said support and provided with an unm-olding plate,

a stationary press headsecured on the other end of said support and comprising a. cylinder, a piston movable within said cylinder and adapted to exert the pressing action iowards the table and to be raised thereafter for permitting the unmolding, two concentric screws fcoaxial with the cylinder', a nut screwed on the outer screw and adapt-ed to slide Within said cylinder, means for rotating both screws independently from each other, the piston being adapted to come against the inner end of the central screw at the end of its upward stroke, and to come against the nut at the end of its downward stroke, means for lifting the unmolding plate, and means for rotating said support about a horlzontal axis.

5. A rotary molding machine comprising a vertical rotatable support, a movable table adapted to pivot about one end of said support and provided with an unmolding plate, a stationary press head secured on the other end of said support and comprising a cyiin-l der, a piston movable within said cylinder and adapted to exert the pressing action to wards the table and to be raised thereafter i'or permitting the unmolding, means for lifting said unlnolding plate, a horizontal shaft carrying said support, means for connecting' said shaft to a driving piston which is adaptedto move within a second ('1yli'nder,

vand means forl admitting a fluid under pres` sure at each end of said second cylinder a1- ternately.

In testimony whereof I have name to this specification.

EUGNE VICTOR RON CERAY.

signed my 

